Open up to traffic and loading in one hour with Rapid Set DOT Repair Mix. DOT Repair Mix is a high-performance fast-setting concrete structural repair material that is extendable by adding rock for large placements. It is air entrained for long life in critical applications. Use for concrete repair, highway repair, dowel bar retrofit, construction of pavements, bridges, parking decks, ramps, joint repair, formed work, and more. Conforms to ASTM C928.